研究目的
To improve the photocatalytic efficiency of sillenite-type materials by constructing a novel Ag–Bi25GaO39–Bi2WO6 heterostructure through interface structure design for enhanced degradation of pollutants like Rhodamine B, phenol, and Cr(VI).
研究成果
The Ag–Bi25GaO39–Bi2WO6 heterostructure exhibits enhanced photocatalytic activity due to efficient charge separation from interface design, providing a new approach for composite photocatalyst development.
研究不足
The photocatalytic performance under UV-visible light is still lower than TiO2 (P25) in some cases, and the synthesis may require optimization for scalability and cost-effectiveness.
1：Experimental Design and Method Selection:
A partial chemical conversion strategy coupled with photo-reduction method was used to synthesize the heterostructure.
2：Sample Selection and Data Sources:
Pre-prepared Bi2WO6 nanosheets were used as Bi source; Ga source and Ag nanoparticles were incorporated.
3：List of Experimental Equipment and Materials:
Instruments included XRD, SEM, EDS, XPS, UV-vis spectrophotometer, HRTEM; materials included Bi2WO6, Ga source, Ag nanoparticles, and pollutants like RhB.
4：Experimental Procedures and Operational Workflow:
Synthesis involved hydrothermal methods and photodeposition; photocatalytic tests were conducted under UV-visible light irradiation with active species capture experiments.
5：Data Analysis Methods:
Data were analyzed using first-order kinetics, XPS for valence states, and PL spectra for charge separation efficiency.
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X-ray diffractometer
Characterization of crystal structure
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Scanning electron microscope
Morphology analysis
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Energy dispersive spectrometer
Elemental mapping
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X-ray photoelectron spectrometer
Valence state analysis
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UV-vis spectrophotometer
Optical property measurement
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High resolution transmission electron microscope
Microstructure imaging
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Photoluminescence spectrometer
Charge separation efficiency measurement
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